Changeset 44e8541 in mainline for common/stdc/calloc.c

Timestamp:

2023-10-27T17:38:32Z (16 months ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

master, topic/msim-upgrade, topic/simplify-dev-export

Children:

fdfb24e

Parents:

b169619

git-author:

Jiří Zárevúcky <zarevucky.jiri@…> (2023-10-27 15:17:18)

git-committer:

Jiří Zárevúcky <zarevucky.jiri@…> (2023-10-27 17:38:32)

Message:

Move stdlib.h and some of its function into /common

File:

• common/stdc/calloc.c (moved) (moved from kernel/generic/include/stdlib.h ) (2 diffs)

common/stdc/calloc.c

@@ -1 +1 @@
 /*
- * Copyright (c) 2006 Ondrej Palkovsky
+ * Copyright (c) 2009 Martin Decky
+ * Copyright (c) 2009 Petr Tuma
  * All rights reserved.
  *
@@ -27 +28 @@
  */
 
-/** @addtogroup kernel_generic_mm
- * @{
+#include <stdlib.h>
+
+#include <mem.h>
+
+/** Allocate memory by number of elements
+ *
+ * @param nmemb Number of members to allocate.
+ * @param size  Size of one member in bytes.
+ *
+ * @return Allocated memory or NULL.
+ *
  */
-/** @file
- */
+void *calloc(const size_t nmemb, const size_t size)
+{
+        // Check for overflow
+        if (SIZE_MAX / size < nmemb)
+                return NULL;
 
-#ifndef KERN_STDLIB_H_
-#define KERN_STDLIB_H_
+        void *block = malloc(nmemb * size);
+        if (block == NULL)
+                return NULL;
 
-#include <stddef.h>
-
-extern void *malloc(size_t)
-    __attribute__((malloc));
-extern void *realloc(void *, size_t)
-    __attribute__((warn_unused_result));
-extern void free(void *);
-
-#endif
-
-/** @}
- */
+        memset(block, 0, nmemb * size);
+        return block;
+}